I asked this question earlier in the year, it's a thread called 'Can dogs sense things', I got some excellent replies. It was also about pregnancy as I was only 5 weeks at the time my dog started behaving strange, he still won't leave me alone and has to watch every move I make, he even cries when I go out.
Try and find the thread, if you have problems let us know!

No reason to be concerned. Animals are very sentient,and may be affected by pheromones and other scents that are unique to pregnancy. Just because we don't consciously react to these, it is not unusual for animals to react.

Why did u get rid of the cat? Apparently a child who is exposed to the hair on a cat as a newborn is less likely to develop asthma. Also, there are other ways of keeping your cat away from your child's sleeping area.

I am sorry but i just don't understand why after so many years of loving and caring for an animal, people can just give them up because it suddenly does not suit your lifestyle.

Why did u get rid of the cat? Apparently a child who is exposed to the hair on a cat as a newborn is less likely to develop asthma. Also, there are other ways of keeping your cat away from your child's sleeping area.

I am sorry but i just don't understand why after so many years of loving and caring for an animal, people can just give them up because it suddenly does not suit your lifestyle.

Very sad...

Is this not negative? Please Cridie20, reread your post(s) in the "Cat can't walk" thread. Circumstances aside from this thread here...you are contradicting yourself on the subject of negativity.
Stick around, read, join in...I promise you, you will understand more about what makes this board tick...shooting from the hip will only result in you being shot back at.